具硫醚鏈醌型噻吩衍生物 有機薄膜電晶體材料之開發

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题名:	具硫醚鏈醌型噻吩衍生物有機薄膜電晶體材料之開發
作者:	陳政勳;Chen,Cheng-Shiun
贡献者:	化學學系
关键词:	醌型噻吩;有機薄膜電晶體
日期:	2016-07-25
上传时间:	2016-10-13 12:43:30 (UTC+8)
出版者:	國立中央大學
摘要:	本研究以兩種具硫醚碳鏈之聯噻吩為核心，於其兩側引入氰基 (CN)，開發出兩系列醌型材料 DTDSTQ 及 TSBTQ。末端之氰基使 LUMO 能階更為下降(-4.2 eV)，使其具有相當優異 n-type 電性及空氣穩定性。第一系列，藉由中心噻吩硫醚鏈上之硫原子與兩側噻吩硫原子之 S‥S 分子間作用力，開發出 DTDST 核心，於其兩側引入氰基開發出兩個具不同長碳鏈之醌型 DTDSTQ-6 (1)、DTDSTQ-14 (2)，同時並開發不具 S‥S 分子間作用力之 DTDRTQ-14 (3) 作為比較。實驗室之前已開發之醌型 SBT 分子溶解度不佳，故本論文中之第二系列開發出具四條硫醚鏈之 TSBT 核心以改善其溶解度。於核心兩側引入氰基開發出兩個具不同長碳鏈之醌型 TSBTQ-6 (4)、 TSBTQ-14 (5)。利用 UV -vis 和 DPV 探討所開發分子的 HOMO 與 LUMO 能階，藉 TGA 和 DSC 探討這些新開發材料之熱穩定性。並由溶液製程製成元件初步測試 DTDSTQ-14 (2) 具有 n-type 場效性質，載子移動率可達 0.4 cm2/Vs。;Two series of new quinoidals based on thioalkylated bithiopene cores, DTDST and TSBT, have been developed for organic thin film transistors (OTFTs). For the first series, 3, 4-dithioalkylated thiophene was end capped with thiophene to give DTDST core. Via the reaction of the latter with dicyanomethane, tetradecylthio and hexylthio quinoidals, DTDSTQ-6 (1) and DTDSTQ-14 (2) were developed. For comparison, tetradecylated DTDRTQ-14 (3) was prepared. Currently, thioalkylated DTDSTQ-14 (2) exhibit the highest mobility up to 0.4 cm2/Vs. In contrast, non-thio alkylated DTDRTQ-14 (3) exhibit lower mobility of 0.2 cm2/Vs. Perhaps due to extensively intra- and inter- S…S molecular interaction, the former with better conjugation, led to better molecular packing, and therefore demonstrated higher performance. For the second series, four thioalkylated bithiophenyl core, TSBT, was prepared to improve the solubility of quinoidals. Tetradecylthio and hexylthio quinoidals, TSBTQ-6 (4) and TSBTQ-14 (5) were developed. Currently, TSBTQ-6 (4) exhibit mobility approach to 0.1 cm2/Vs. All these new quinoidals exhibit pretty low LUMO (< -4.2 eV) and thus are potential air stable n-type materials.
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